Bearing cap grinder



Nov. 29, 1955 F. A. WAGNER BEARING CAP GRINDER Filed Dec. 20, 1952INVENTOR.

FREDERICK/I. WAGNER BY :rhv

ATTORNEY Unite States Patent 2,724,932 :Patented 1NOV.=u29, 1:955

aza ea vs;BIilARlltlG GRINDER Freder k .A. .Wggt r,.Liyermor ttqaliApplication, December 205 1952) Serial Nou'322507 7 59m n ttc t fi m-1ZThis I invention relates-togrinding -rnachines-particularly arranged andadapted --for -facing-ofl-the edgesof bearing caps andablocks,-especially the -crankshaft-bearing ends .":of -conneeting. rodspreparatory to reboring or regr indsing and honing such bearings torestoretheir rotundity.

The principal objects of the invention areteprovideime-provernents insuchgrindingma'chines whereby extreme --I-aeeuracy .is assured throughsimpleoperations-quickly performed.

mBriefly tdescribed my-improvedgrinding nachine com- =-prises a rim or=cup; shaped motordriven-emerywheel or I tether grindstone operatively imounted on a-heavy-base,

and past the edge ofiiwhich swings-a pivotally-mounted oairiageortable'upon-which thbearing-block or cap is "clamped; to thereby-face off the edge obthe cap w-hi ch' is adjacentnthe stone to adegree-predeterminecLbyan -ad- .'.justable-\ oontactgauge carried by--sa-id-base; the swing :lttablerbeing-aalso pivoteddo said base andmanually-opermated.

u-Specifiohfeat-ures 20f novel construction will appearvin wi'the'following description.andaccompanying drawings.

i Fig. is aperspective view of myimprovedbearingtcap grinder, lasrnanu-fiactured, -and-ineorporating also a hone rotor grinding andxfinishing the bores the' bearings-after mth'eirblocks have been;groundelf along their split-junc --ture.

I Big-: 2.is aplan view of the swingingcarriage,- with the:-.-.t-able.and clamping-'plate-aremovd.

{Bigz: 3; is aplan =view-of the table plate.

Big; 4 is a' side elevation:oflthenppenend ofitheswing: a r;ting-carri-agewithtable plate and bearing elamp in pla'w.

:sEigi: 5.-is amend: elevatiom of the gage on its-pedestal ushowminoperative --relat-ion--twil ig. 4.

Fig. 6 is a front elevation of the gage on its-pedestal.

Zia aplan yiew Pa tiea e shhwah itt to the table plate and to the cuppeden ery wheel or other grinding stone.

3i nt i fih fi tlil,..ah lnwithtmffilfqll ezfirst totEigt '1, h nrnerala1 esign tcs. a he vy ha eeblock provided: with w l U'PP E .h. :2: tljibp t dl-asm t tian nwhich met r.- is directaeonnected we? d i el'L lP.Rd,.g l 5jil g.Wh6k 5 partiallytenclosed in 1-1. ahcu hn tfials tsedwtott e surfaced portion zr fil he .r e win ing.qartiagee mprises abracket 7,;carsin edte a ei-r gid.llprig tam 8;-\.fQ,r;-.m: in egralawith a massive bar 9 which; entends horigontally parallel to the axis ofthe motor and grinding wheel axis and is support ed on conical pivotbearings ltl seated jn eqrnplementary sockets 10' formed in oppositesides of the base 1v or secured thereto. The conical pivots 10 arecarried on lugs 11 projecting laterally from the bar 9 and threadedtherein for adjustability and locked by set screws 11'. The lugs 11embrace front and back walls of the base 1, and the adjacent end wall 1of the base forms a stop for the bar 9 when the carriage is at the leftend of its movement, as in Fig. l.

selmupnntwhich a drivingmotor zfiromsthezabove it will .betseen thatthecarriage bracket 7umay.ibermanuallylswungback and fiorth acrossatheefor- -i-ward.edge:of. the-cupped grinding wheel 5 andtthat anyabearingw-blockuori other piece of work clamped to :-.the 5 carriage.and projecting rearward beyondthe-jace of the wwheelvwill' .begroundioff ifsthe wheel is running;

T Tolhold such a.bearingrortother sirnilan piece ofhffwork .Jtintplaceonthecarriag a table plate.ILisprovidedJ QEhis nqalgteiis relativelyuthickand. accuratelyasurfacedLand rests lo t ratlitstr ear -.lowe'r1(marginon two finished lugs 13ipr ojecting -:slightly- \upwardafrom; thecarriageahrackett 7 ,hand at: its g-forwardmarginon an adjusting orleveling-screw 1,4-and is -siastened downtby two capscrews=15 projecting.upwardly inthroughuthe bracket'Z and; screwed ifitozthreadedvholessfi'15min the under sidetofi-the plate 12 only, whileifirmlyserewed '5.iXltOiLthG upper, rear. margin ofwplate. 12,icen.trally thereof is avertical rod '16 icoiledraboutwhichisa compression utspring 117 .bearing.againstrthe underxsideaofi. a clamping tiplatesls throughwhichtv-rod16. passes,.and. which plate l8 201;; iselceptafromt-tturningtabout:sthearod 16sbyeanothenrod 22119 which, is,-scr.ewed,into ai -corner.hholei119!vimplate: 12 a dprojects.upward;;throughatmatching hole in clamptming plat ;rRod 16, istthreaded fromaitsvuppernend: down a sufficient distance to permit theapplicationetheretot-of ahlong .t-tubul aruthreadedwrenchdikeflmemberJt) vprovided fwi th a handleggl tortscrewingtdownagainst the elampingrplate to: once; it;t.d, owrrr andzxcl amp... a halfbeari'ngfi cap 0r m pck; .(a s indi catedat 22in Eig; )9,firmlytingplace against aoett e=-tah e;p1a ';12-

Ebe -gage which determinesthe-amount ltoabeaground e worl; comprises apedestal; 23 tsecured touthe-ma ase- Z as by. a capi screw l l andion"top, of. which p K a: i1at;plate 25 adjustablybheld.iripositionuby 9341gblgckz lfitweldedat,itsrearedge.ttottheiupper bowed tspringaarm -27,inttilrn welded Lat its Q pedestalnwhilea cap-sscreww28r passesaidswwarv v thrhhgh ahole in thezblq ezfiandttlirougli a sl ti-tfifi plae-25, t -..S ;l1eW into.- the upper tend railhe 40 pedestal, thusproviding for turning-tithes p1atetv=25 about the ge ieal axisp screw 8randralso movingdhe-plate or: tfqlwardlycand clamping it 1 Q; 2. tblfldeubeingttaperedttowardithe w sh, -=1R ethlvprovided twithassuitable1 "@5 l? @2s;f E:P $hi g: he:blfl e back andsforthwinjxthe ring a; ieinfi 3 scribed; on theblade ttoltlany 1 9ml; @B 3 5. 2 filscribedg'along ,thesedgesof tfi l in ufmmap a e @SL-in leontactiwithathe@d' fi blad itsbeingsunderstobdr-that l qazi 5 Mather Same angle; as t it we-e ge ofethe qs slttt es-ferward qi i hith from and ettest-t9 -e a al m tr a t assl st theorems 1. .pfith mbt t'li dflw i' Shaft. h i. t, Wefilottedzplate 11 w i easi t t a lz ed a a is formed with a Ugshapd gapor cut-pundit itsjorward edge-andspanning which gap are two fiat springstr1ps9, the opposite en ds of wliich are tightlypress ed iri't o slotsformed in the forwardly extending horns or edges of the gap. These twoflat springs are in line one directly above the blade 30 and the otherbelow it and both extend at the same angle parallel to the tapered rearedge of the blade, while a small pin 40 projecting tightly through bothsides of the blade slidably contacts the rear sides of both springs tothereby resiliently urge the tapered edge of the blade against the rearwall of the slot 31 as the blade is slid back and forth to any desiredpoint along the scale 34. The scale graduations may be such that alongitudinal movement of the tapered gage blade one division willdisplace the forward or gaging edge of the blade, a thousandth of aninch, or 2 or 73 as may be desired. Therefore, if any bearing cap orother block be clamped to the carriage in position so that as thecarriage is swung to grind a little off of it, then swung back tostarting position in front of the gage, and the gage clamping screw 28be released sufficiently to move the forward edge of the gage blade 30into contact with the freshly ground surface of the block and locked insuch adjusted position, the forward straight edge of the gage blade willbe in absolute alignment with the grinding wheel, so that if the edge ofthe blade be moved rearwardly a trifle, say two one-thousandths of aninch by sliding the tapered blade to the right (in Fig. 7) one divisionof the scale 34, and any piece of work be laid on the table plate 12,moved into contact with the so adjusted blade, then clamped to the tableand passed over the grinder, exactly that much will be faced off.

Wear on the face of the grinding wheel is compensated for by merelyloosening screw 28 and moving the upper part of the gage structureincluding plate rearward and retightening the screw. For some kinds ofwork other than split bearings where the position for clamp screw 16 asshown would be in the way, the screw can be positioned anywhere else ontable plate 12, or loose clamps can be used.

When worn or distorted connecting rod bearings have had the cap portionand the rod portion faced off as above described, they are boltedtogether again and of course the opening will be slightly elliptical,and they are then ground internally or honed to perfectly round form onthis same machine by passing them over a forwardly extending expansiblegrinding mandrel 41, with the other end of the connecting rod supportedon a forwardly projecting guide or stud shaft 42. This grinding mandrelis driven by the same motor 3 and may be thrown into and out of drivingconnection by a control handle 43. The specific details of thisexpansible mandrel is the subject of a copending patent applicationfiled by me on date of December 20, 1952, Serial 327,076, now Patent No.

2,718,103, dated September 20, 1955.

Having thus described the preferred construction of my improved bearinggrinding machine and the manner of its principal use, what I claim is:

1. In a grinding machine having a base with a grinding wheel rotatablymounted thereon, and a work table movable mounted thereon to move backand forth with one edge adjacent to and parallel to the grinding face ofsaid wheel to carry a work article across said face for grinding offsaid article, and means for securing a work article on said table, theimprovement which comprises an elongated gage for predeterming theposition of a work article secured to said table, said gage mounted on afixed portion of said base adjacent said edge of the table and providedwith an elongated straight-edge extending along normally parallel withthe movement of said edge of the table above and rearwardly thereof, andagainst which straight-edge the work article is aligned for securing tothe table and may move therealong as the table is moved across thegrinding whee], said straight edge comprising a blade tapered in widthand slidably supported in a guide in a manner so that upon sliding theblade longitudinally its work contacting edge will be parallel to andrecede or advance with respect to the grinding plane, and a scaledesignating the amount of displacement of the work contacting straightedge of said blade.

2. In a grinding machine of the character described including arotatable grinding wheel and a work table movably mounted to carry awork article into the path of the wheel for grinding off a portionoverhanging the table, a stationary gage for predetermining the amountto be ground off comprising a fiat elongated blade tapering in widthtoward one end, a supporting plate slotted to form a guiding seat forsaid blade with one long edge seated against the bottom of the slot,spring means urging edge of the blade to contact the bottom of the slotwhile permitting the blade to slide longitudinally in the slot, a fingergrip provided on said blade for sliding the blade back and forth, afixed scale carried by said plate along and adjacent one edge of theblade cooperating with designating indicia on the blade to indicate themovement of the blade when slid longitudinally, the outer long edge ofsaid blade extending out of the guiding slot and forming a straight edgepositioned adjacent said work table for contacting by a work article forpositioning it on said table to predetermine the amount to be ground offof the article secured to said work table in contact with said straightedge.

3. In a structure as set out in claim 2, means for rigidly supportingthe slotted plate while permitting its adjustment toward and from saidwork table.

4. In a structure as set out in claim 2, means for rigidly supportingthe slotted plate while permitting its adjustment toward and from saidworktable and also for angular adjustment with relation thereto.

5. In a grinding machine having a base with a grinding wheel rotatablymounted thereon, and a work table movably mounted thereon to move backand forth with one edge adjacent to and parallel to the grinding face ofsaid wheel to carry a work article across said face for grinding offsaid article, and means for securing a work article on said table, theimprovement which comprises an elongated gage for predetermining theposition of a work article secured to said table, said gage including apedestal rigidly secured to said base, a plate adjustably secured to thetop of the pedestal, and a fiat tapered straight edged bladelongitudinally slidable in a slot formed in the edge of the plate withone long edge seated against the bottom of the slot and the oppositeedge extending freely adjacent the work article for contacting andaligning the work article against the straight edge of the blade when onsaid table in locating it thereon, the adjustability of said plateproviding for movement of the plate bodily toward and away from saidwork article, and the tapered gage blade mounting effecting a paralleldisplacement of its free straight edge when the blade is slidlongitudinally.

References Cited in the file of this patent UNITED STATES PATENTS448,616 Hudson Mar. 17, 1891 630,536 Heald et al Aug. 8, 1899 740,263Fisher Sept. 29, 1903 798,538 Stedman Aug. 29, 1905 2,032,538 Kulp et alMar. 3, 1936 2,104,345 Holhut et a1. Jan. 4, 1938 2,151,528 Preston Mar.21, 1939 2,598,055 Hogsfors May 27, 1952 FOREIGN PATENTS 22,562 GreatBritain Oct. 10, 1896 455,814 Germany Feb. 10, 1928

